diff --git a/setup.py b/setup.py
index 3a18076c2e89..722b77a2baf5 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
 REQUIREMENTS = [
     'httplib2 >= 0.9.1',
     'googleapis-common-protos',
-    'oauth2client >= 1.4.6',
+    'oauth2client >= 1.4.6, <2.0.0',
     'protobuf >= 3.0.0b2',
     'pyOpenSSL',
     'six',